Acromioclavicular joint dislocation (AJD) is one of the most common shoulder injuries, accounting for about 12% of Shoulder joint injuries. It will mainly cause the shoulder joint to feel pain and movement restrictions during exercise, which will cause inconvenience to the patient's work and life. Therefore, the treatment of this injury is also critical. At present, many doctors and patients have affirmed the clinical efficacy of clavicular hook plate (CHP) internal fixation in the treatment of AJD. However, this method is also prone to complications such as shoulder joint pain. In recent years, the Endobutton titanium plate (ETP) has been used to treat AJD injury and has achieved good therapeutic results. But there is no consensus on the effectiveness of these two methods.

To compare the case curative effect between ETP and CHP in treating AJD.

From June 2017 to May 2021, 46 patients with Rockwood typeⅢ-ⅤAJD treated with ETP and CHP in our department were selected as the research objects. According to the surgical treatment methods, they were divided into CHP internal fixation group (control group, n=22) and ETP fixation group (observation group, n=24) ; The operation time, intraoperative bleeding, length of hospital stays, incidence of complications, of pain before operation, three days, three months and 12 months after procedure, shoulder function and acromioclavicular dislocation reduction six months after operation were compared between the two groups.

There was no difference in operation time, intraoperative bleeding, postoperative internal fixation failure, acromion impact, and heterotopic ossification between the two groups (P>0.05) . In contrast, the postoperative hospital stay in the observation group was less than that in the control group (P < 0.05) . The postoperative shoulder pain and total incidence of complications in the observation group were lower than that in the control group (P<0.05) . There was no significant difference in pain visual analogue scale (VAS) score between the two groups before the operation and 12 months after the procedure (P>0.05) ; The pain VAS score of the observation group was lower than that of the control group three days and three months after operation (P<0.05) . The shoulder function Constant-Murley score of the observation group was higher than that of the control group 3 months after the operation (P<0.05) . There was no significant difference in the sound, moderate, and poor recovery rate of shoulder joint function between the two groups 12 months after the operation (P>0.05) ; The excellent and excellent rate of shoulder function recovery in the observation group 12 months after operation was significantly higher than that in the control group (P< 0.05) ; There was no significant difference in the distance from clavicle to coracoid process between the two groups 12 months after operation (P>0.05) .

The Endobutton plate's clinical efficacy in treating acromioclavicular joint dislocation is relatively better than that of the clavicular hook plate in the incidence of shoulder pain and other complications, postoperative pain relief, and joint function recovery.